/* Caratteri, reset minimo, tipografia di base. */

@font-face {
  font-family: 'IBM Plex Sans';
  src: url('/fonts/IBMPlexSans-Regular-Latin1.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Sans';
  src: url('/fonts/IBMPlexSans-Italic-Latin1.woff2') format('woff2');
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Sans';
  src: url('/fonts/IBMPlexSans-Medium-Latin1.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Sans';
  src: url('/fonts/IBMPlexSans-SemiBold-Latin1.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('/fonts/IBMPlexMono-Regular-Latin1.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('/fonts/IBMPlexMono-Medium-Latin1.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

/* L'attributo hidden vince sempre: senza questa regola un `display: flex` di classe (.field-row,
   .choice) mostrava campi che il programma aveva nascosto. */
[hidden] {
  display: none !important;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

/* La testata resta ferma in alto: il campo col focus (anche con Maiusc+Tab) e i titoli raggiunti
   da un link interno si fermano sotto, non dietro. --testata la misura il layout. */
html:has(.site-header) {
  scroll-padding-top: calc(var(--testata, 5rem) + 0.75rem);
}

body {
  margin: 0;
  -webkit-font-smoothing: antialiased;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-m);
  line-height: var(--lh-text);
  font-variant-numeric: tabular-nums;
  /* una parola più lunga della riga (nome del cliente, email, indirizzo) va a capo invece di
     uscire dallo schermo o dal foglio stampato */
  overflow-wrap: break-word;
}

main {
  display: block;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 var(--sp-4);
  line-height: var(--lh-title);
  text-wrap: balance;
}
h1,
h2,
h3 {
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}
h1 {
  font-size: var(--fs-2xl);
}
h2 {
  font-size: var(--fs-xl);
}
h3 {
  font-size: var(--fs-l);
  letter-spacing: -0.01em;
}
h4 {
  font-size: var(--fs-m);
  font-weight: 600;
}
@media (min-width: 48rem) {
  h1 {
    font-size: var(--fs-3xl);
  }
}

p,
ul,
ol,
dl,
table,
figure {
  margin: 0 0 var(--sp-4);
}
p,
li {
  max-width: var(--measure);
  text-wrap: pretty; /* niente parola sola sull'ultima riga */
}

a {
  color: var(--blue);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  text-decoration-color: color-mix(in srgb, currentColor 40%, transparent);
}
a:hover {
  text-decoration-color: currentColor;
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  border-radius: 2px;
}

::selection {
  background: var(--blue-tint);
  color: var(--ink);
}

img,
svg {
  max-width: 100%;
}

code,
kbd,
samp,
.num {
  font-family: var(--font-mono);
  font-size: 0.94em;
}

hr {
  border: 0;
  border-top: var(--rule);
  margin: var(--sp-6) 0;
}

small {
  font-size: var(--fs-s);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -3rem;
  padding: var(--sp-2) var(--sp-3);
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius-s);
  z-index: 10;
}
.skip-link:focus {
  top: var(--sp-2);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

/* Sulle fasce scure (piè di pagina, apertura della home) il blu non si vede: contorno bianco. */
.site-footer :focus-visible,
.hero :focus-visible,
.cta-band :focus-visible {
  outline-color: #ffffff;
}